I loved Indymedia at the time. It was around the time of the Iraq War, which I really objected to, and it helped me find local peace campaigning groups. I can't remember why I drifted away from it - maybe just because there were more groups appearing online to distract my attention, and also I'd been working from home as a freelance, and I got a full-time job in 2002, so I had less time for online browsing.
On Steemit, when I write a travel post I always post it to the Steemitworldmap.com. Just go to the website and it gives details on how to attach your post to the map. Your post will then get mentioned in their daily TravelDigest. You can also include #Travelfeed as a tag, which is another great curation stream.
I'm not aware of groups for fashion and social/environmental justice. Try doing searches under various tags for those subjects and see what comes up, or if you know of other Steemians who write on those issues, look at how they promote their work. Joining a generic group, like qurator, can be very helpful. You could launch your own curation trail too!